The maximum conductivity was found to be equal to 0.07S/cm, at 300K, and corresponded to the composition, Ag16I12P2O7. This compound was studied at temperatures of between 77 and 320K; using frequencies of 50 to 100kHz. It was found that the conductivity was higher along the c-axis. The activation energy for conduction in this direction was equal to 0.4eV at low temperatures. This increased to 0.14eV at temperatures greater than 300K. The activation energy for conduction perpendicular to the c-axis was equal to 0.28eV, and this value was essentially temperature-independent. These effects were attributed to the distribution of Ag+ ions on sites of various type.

M.Sayer, S.L.Segel, J.Noad, J.Corey, T.Boyle, R.D.Heyding, A.Mansingh: Journal of Solid State Chemistry, 1982, 42[2], 191-205